Mormon Outreach has an interesting listing of Mormon sources that adamantly counter the identity of Jesus as portrayed in the Bible — particularly the details of His birth.
Take a look here and see what you think.
As for me, I'm putting all my hopes on a virgin-born, always-God Savior. Happy birthday, Jesus.
For more information, see The Mormon Mirage 3rd Edition: A Former Member Looks at the Mormon Church Today(Zondervan, 2009). Also available as an audiobook and as an expanded-text E-book for Nook, Kindle and other reading devices.